English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. A rigid-body dynamic model of multi-stage planetary roller screwmechanism (multi-stage PRSM) is proposed in this paper. The structure ofmulti-stage PRSM is introduced and the motion analysis is presented. Thetotal kinetic energy of the mechanism is calculated. The rotation of thescrews and carriers is chosen as generalized degrees of freedom. Thegeneralized forces and motion equations of multi-stage PRSM are derivedusing the Lagrange method. The transient and steady-state behaviours ofmulti-stage PRSM are simulated, followed by an analysis of the influence offriction coefficients and thread pitches on the motion and forces acting onthe multi-stage PRSM. Taking a two-stage PRSM as an example, the simulationresults show that the friction coefficient between screw #1 andscrew #2 has a slight effect on efficiency and rotational velocity ratiosof carriers to screws. When the sum of the pitches of screws is a constant,the axial component of contact force between screw #1 and roller#1 decreases with the increase in the pitch of screw #1.

Lagrange-method-based dynamic analysis of multi-stage planetary roller screw mechanism